Shoe-sewing machine.



Patented May 20, I902.

T. K. KEITH.

SHOE SEWING MACHINE.

(Application filed Oct. 1, 1901.)

3 Sheets-Sheet L (No Model.)

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No. 700,693. v Patented May 20, I902.

T. K. KEITH.

SHOE SEWING MACHINE.

(Application filed Oct. Q1, 1901.)

(No Model.)

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T. K. KEITH. I

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[Application filed Oct. [1. 1901.)

3 Sheets-Sheet 3,

(No Model.)

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fi y W" UNITED STATES PATENT. OFFICE.

THOMAS .K. KEITH, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO TONGUE LOCK SEWING MACHINE COMPANY, A CORPORATION OF MAINE.

SHOE-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent N0. 700,693, dated May 20, 1902. Application filed October 1, 1901. Serial No. 77,218. (No model-l To all whom, it may concern.-

Be it known that I, THOMAS K. KEITH, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Boot and Shoe Sewing FI&Cl1l116S,'OfWhlCll the following is a specification.

This invention relates to machines for securing the upper to the sole of a boot or shoe by loops from a single thread drawn through the upper and through the portion of the sole usually known as the between substance,

the bights of the loops being drawn over and locked by tongues cut in one side of the sole. The present invention relates particularly to machines of this character employing loopforming mechanism, which includes an oscillating needle adapted to draw a loop of thread through the upper and the between substance and to hold it temporarily over the sole be fore the operation of taking up the loop; and it has for its object to provide improved means for spreading the loop prior to and during the taking-up operation, and thus insuring the proper engagement of the loop with a tongue out in the sole, the loop being drawn down and tightened across the tongue by the operation of the take-up mechanism.

The invention consists in the improved loop spreading and controlling mechanism hereinafter described and claimed.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents an end elevation showing my improved loop spreading and controlling mechanism in connection with certain other parts of the machine, the loop-spreader being shown in its depressed position and bearing upon the outer surface of the sole. Fig. 2 represents a View similar to Fig. 1, showing the loop-spreader raised and retracted and the needle projected. Fig. 3 represents a view similar to a portion of Fig. 2, showing the needle retracted and holding the loop over the sole and the loopspreader advanced into the loop. Fig. at represents a perspective view showing the loopspreader and needle in the position shown in Fig. 3. Fig. 5 represents'a fragmentary view looking downwardly upon the sole of the shoe and showingthe members of the loop-spreader in the positions represented in Fi 1. Fig.

6 represents a section on line 66 of Fig. 1, and Fig. 7 represents a section on line 7 7 of Fig. 1.

The same numerals of reference indicate the same parts in all the figures.

In the drawings, 1 represents the oscillating curved needle, the carrier 2 of which is pivoted at 3 to the frame of the machine and may be oscillated by any suitable means. The machine is equipped with suitable instrumentalities cooperating with the needle, whereby the needle is enabled to draw a loop 5 from a single'thread through the upper 7 and through the between substance of the sole 70 of a boot or shoe, each loop being drawn through the between substance under a tongue 8, cut in the outer surface of the sole, as shown in Fig.4, and subsequently taken up, so that its neck portion extends across the said tongue and is locked thereby, as shown in Figs. 4 and 5. Since my invention relates only to the means for spreading and controlling the loop while it is being taken up, I have not deemed it necessary to show and describe the said cooperating instrumentalities. The said loop spreading and controlling mechanism comprises a spreader adapted to enter the loop 5 while the latter is held by the needle and composed of two arms or members 9 9, which are movable laterally toward and from each other to contract .the spreader, as shown in Fig. 4:, andto expand it, as shown in Fig. 5, the spreader being adapted when in its contracted condi-. tion to separate or spread the side portions of the loop and to support or control the loop in such manner as to insure the proper engagement of its neck portion 50 with the accompanying tongue 8. The spreader members are formed on the lower ends of levers 1010, which are fulcrumed at l2 12 to the lower end of a carrier-arm 13. Said armis pivoted at 14: to one arm of a bell-cranklever 15, which is fulcrumed at 16 on the frame. The other arm of the bellcranklever 15 has a cam-shaped slot 17, which receivesastud 18 on an operating-lever 19. The lever 19 is fulcrumed at 20 on the frame and has at its outer end a stud 21, which enters a camshaped slot 22 in the carrier-arm 13. The outer end of the operating-lever 19 has a trundle-roll 23, which enters a cam-groove 24 in a disk on the shaft 25, the operating-lever being oscillated by the rotation of said shaft. The oscillating movements of the lever 19 cause the stud 18 and the walls of the camshaped slot 17 to oscillate the bell-crank lever 15, which in turn vertically reciprocates the carrier-arm 13 and the spreader members 9 9, the latter being thus moved toward and from the sole. The stud 21 and the walls of the cam-shaped slot 22 cause the carrierarm to oscillate during its vertical movements, its oscillations causing it to enter and leave the loop.

The spreader-operating means thus far described move the spreader bodily toward and from the sole and into and out of the loop. I have also provided means for moving the spreader members laterally in opposite directions, thus alternately expanding and contracting the spreader, said means comprising studs 26 26, formed on the lower ends of arms 27 27, which are pivoted at 28 to the lever 19 and cam-shaped slots 29 29 in the lovers 10 10, said slots receiving the studs 26. The arms 27 are provided with slots 30, which receive studs 31, aflixed to the bell-crank lever 15, said slots and studs confining the arms 27 and studs 26 against loose oscillating movement on the studs 28.

The operation is as follows: When the needle has drawn a loop 5 through the upper and the between substance and stands in the position shown in Figs. 3 and at, the spreader is contracted and its members 9 9 are raised and retracted, their pointed forward ends bein g close together and in position to enter the loop at a point between the needle and the sole. The spreader while contracted moves forward into the loop and is then moved downwardly and during its downward movement is expanded, so that when it bears upon the sole its members 9 9 are well separated and are at opposite sides of the tongue 8, under which the loop was drawn, as shown in Fig. 5. The loop is disengaged from the needle by suitable cast-off mechanism after the spreader has entered it, and after the spreader members reach the position shown in Figs. 1

and 5 the take-up mechanism pulls in the slack of the loop and draws the neck of the loop down upon the tongue 8, the spreader members being moved backwardly out of the loop before the loop has been entirely taken up. The spreader is afterward raised to the position shown in Fig. 2 and is contracted during its upward movement. It will be seen that the expansion of the spreader after it enters the loop, so that its members bear on the sole at opposite sides of the tongue, causes a portion of the loop to extend across the tongue 8 and to a considerable distanceat each side of the tongue, so that there is no liability of failure of the neck of the loop to properly engage and be locked by the tongue. Hence any slight bending or displacement of the tongue to one side or the other of its intended position (which displacement is liable to occur) does not prevent the tongue from properly engaging the neck of the loop.

I do not limit myself to the details of mechanism here shown and described for moving the spreader bodily and for expanding and contracting it, as these details may be variously modified without departing from the spirit of my invention.

I claim- A machine of the character specified comprising loop-formin g mechanism including an oscillating hooked needle adapted to draw a loop through an upper and through the between substance of a sole, and hold the loop over the sole, a loop-spreader composed of two members which are movable laterally in opposite directions to expand and contract the spreader, and spreader-operating mechanism having provisions for moving the spreader as a whole to cause it to enter and recede from the loop and move toward and from the sole, and for moving the said members laterally to expand and contract the spreader, substantially as described.

In testimony whereof I have affixed my signature in presence of two witnesses.

THOMAS K. KEITH.

Witnesses:

C. F. BROWN, A. SEAVER. 

